Australian ant-eater

from The Collaborative International Dictionary of English v.0.48

Echidna \E*chid"na\ ([-e]*k[i^]d"n[.a]), n. [L., a viper, adder,
   Gr. 'e`chidna.]
   1. (Gr. Myth.) A monster, half maid and half serpent.
      [1913 Webster]

   2. (Zo["o]l.) A genus of {Monotremata} found in Australia,
      Tasmania, and New Guinea. They are toothless and covered
      with spines; -- called also {porcupine ant-eater}, and
      {Australian ant-eater}.
      [1913 Webster]